Sully Animal Hospital - Veterinarians Serving Centreville VA - Pet Information

Sully Animal Hospital

5095 Westfields Blvd
Centreville, VA 20120



Pet Information




What Happens to the Sick Dogs?

Infection rate is high but (depending on which report you read) 20-50% will simply make antibodies and clear the infection without any signs of illness at all.
The other 50-80% will get symptoms of the flu: they will have fevers, listlessness, coughing, and a snotty nose. Most dogs will recover with supportive treatment (antibiotics, perhaps nebulization / humidification, etc.). A small percentage of dogs will get pneumonia. These dogs are those at risk for death and thus support becomes more aggressive: hospitalization, intravenous fluid therapy etc. Most of these dogs will recover as long as they receive proper care.

Mortality (death) rate is 5 to 8 percent.

The incubation period is 2 to 5 days and the course of infection lasts 2 to 4 weeks. Because this is an emerging disease, few dogs will have immunity to it unless they have received one of the new vaccines. This means that any dog unvaccinated for influenza is a candidate for infection.

  • The point is not to ignore a coughing dog.
  • Do not allow your dog to socialize with coughing dogs. If your dog develops a cough, see your veterinarian.
  • If your dog develops a snotty nose, listlessness, and cough, do not be surprised if your veterinarian wants to look at chest radiographs and considers hospitalization.


How is the Disease Transmitted?

Dogs that are infected will shed virus in body secretions whether or not they appear to be sick. Virus transmission can occur from direct contact with an infected dog or with its secretions. Kennel workers have been known to bring the virus home accidentally to their own pets. The virus persists on toys, bowls, collars, leashes etc. for several days. Infected animals should be considered contagious for 14 days.


We highly recommend vaccinating your dog against the Flu.  Please call us to get your dogs flu shot. 

If they have never had the flu shot.  They will need an initial Vaccine,

then followed by a booster 2 -3 weeks later.


Where Can I find more Information on Canine Influenza Virus?

More information on canine influenza in pet dogs can be found in this article:Influenza A Virus (H3N8) in Dogs with Respiratory Disease, Florida in Emerging Infectious Diseases journal


In Addition, the following website may provide additional information: